CN105936976A - Technology for pretreating complex and difficult-to-treat gold concentrate through utilizing industrial microware - Google Patents
Technology for pretreating complex and difficult-to-treat gold concentrate through utilizing industrial microware Download PDFInfo
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- CN105936976A CN105936976A CN201610388729.XA CN201610388729A CN105936976A CN 105936976 A CN105936976 A CN 105936976A CN 201610388729 A CN201610388729 A CN 201610388729A CN 105936976 A CN105936976 A CN 105936976A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G28/00—Compounds of arsenic
- C01G28/005—Oxides; Hydroxides; Oxyacids
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/08—Obtaining noble metals by cyaniding
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- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a technology for pretreating complex and difficult-to-treat gold concentrate through utilizing industrial microware. The technology comprises the steps of putting the complex and difficult-to-treat gold concentrate in an industrial microwave oven, and paving the complex and difficult-to-treat gold concentrate; starting a microwave oven fan, and introducing air; starting a microwave heating device to sequentially dry and bake the complex and difficult-to-treat gold concentrate; sending obtained flue gas into a recycling system to recycle As2O3 and SO2, so as to prepare arsenic and arsenic; and sending obtained hot gold concentrate to a cyanide leaching system to recycle valuable metals such as gold and silver. According to the technology, the leaching rate of gold can be greatly increased, the operation is easy, the technological process is short, the reaction temperature is decreased, the reaction time is shortened, and the production efficiency is improved.
Description
Technical field
The present invention relates to the Technology of a kind of industry microwave pretreatment complexity golden ore concentrate hard to treat, belong to gold smelting industry
Field.
Background technology
Along with the development of gold industry, the most totally, Exploitation Scope is by the disposable Huang of single property for domestic disposable gold mine
Gold resource, has developed high arsenic, high-carbon, low-sulfur rapidly and has contained polymetallic difficult-treating gold mine resources domain, and its gold is in Ore
Occurrence status be mainly in gold-carrying minerals the gold in dispersity, gold in colloidal, in Lattice Gold or solid solution gold.Difficult
Mispickel (FeAsS) and pyrite (FeS in Gold Concentrate under Normal Pressure2) it is main gold-carrying minerals, gold is generally with microfine or microscopic state bag
It is rolled in wherein or contaminates in crystal.Using conventional cyaniding gold-extracting method, the direct leaching rate of gold is typically below 80%, very
To only up to 10%～30% had.The method processing this kind of Gold Concentrate under Normal Pressure at present mainly has oxidation roasting method, pressure oxidation method, biology
Oxidizing process, pressurized catalysis oxidation acid leaching method etc..There is energy consumption height, environmental pollution, production high to equipment requirements in these a few class methods
The shortcomings such as cost is high, production capacity is low.
Summary of the invention
Present invention aims to the problem in the presence of prior art, propose one industry microwave pretreatment complicated difficult
Process the Technology of Gold Concentrate under Normal Pressure.
The technical scheme is that and realized by following steps:
Complexity golden ore concentrate hard to treat is laid in continuous way horizontal belt industrial microwave oven by the first step, seam thickness be 25～
100mm, opens microwave oven fan, is passed through air, forms tiny structure in making microwave oven；
Second step starts microwave heating equipment, and microwave frequency is set as that 300MHz～300GHz, pressure are set as
0.075MPa～0.105MPa, microwave source single tube power magnitude be 1kW, 3kW, 5kW, 10kW, 20kW, 30kW or
50kW, successively dries and roasting first step gained complexity golden ore concentrate hard to treat, wherein drying section temperature control be 120 DEG C～
200 DEG C, drying time is 5～20 minutes；It is 400 DEG C～600 DEG C that furnace zone temperature controls, and the roasting volatilization time is 10～30
Minute, it is continuously available volatilization flue gas and hot Gold Concentrate under Normal Pressure；
Gained volatilization flue gas in second step is sent into recovery system and is reclaimed As by the 3rd step2O3And SO2, produce arsenicum and sulphuric acid；
Hot for gained in second step Gold Concentrate under Normal Pressure is delivered to Cyanide Leaching system and is reclaimed the valuable metals such as gold silver by the 4th step.
Further, described microwave frequency is set as 915MHz or 2450MHz.
Further, described furnace zone temperature controls is 400 DEG C～449 DEG C.
Further, described industrial microwave oven is continuous way horizontal belt industrial microwave oven.
According to this technical matters pretreatment complexity golden ore concentrate hard to treat, utilize microwave to have selectivity and add thermal property, make aurin
Ore deposit produces between various mineral thermal stress, causes producing on the interface between mineral crack, effectively facilitated the list of valuable mineral
Body dissociates and adds effective affecting acreage, promotes difficult complicated golden ore concentrate generation chemical reaction or phase transition, promotes difficulty
Reason complicated golden ore concentrate decomposes oxidation.This technical matters flow process is short, and equipment simply depends on and easily operated, by high-intensity microwave electromagnetism
Field action can significantly reduce physical reaction activation energy, improves thermodynamics of reactions and dynamic conditions, and microwave irradiation time only needs
3min～30min, than the conventional low 2h of roasting 2h～2.5h, improves production efficiency；Microwave penetration material also directly couples,
Realizing mineral entirety of the same race quickly to heat without gradient, microwave radiation temperature only needs 400 DEG C～600 DEG C, than conventional roasting 550 DEG C～
750 DEG C low 150 DEG C～200 DEG C；Gold, silver conventional cyanidation leaching rate respectively reaches 98% and more than 60%.
Accompanying drawing illustrates: the concrete structure of the present invention is given by following drawings and Examples:
Fig. 1 is gold and silver leaching rate and microwave radiation sintering temperature graph of relation
Fig. 2 is gold and silver leaching rate and microwave radiation roasting time graph of relation
Fig. 3 is the Technology schematic flow sheet of a kind of industry microwave pretreatment complexity golden ore concentrate hard to treat.
Detailed description of the invention: the present invention is not limited by following embodiment, can be according to technical scheme and practical situation
Determine specific embodiment.
Embodiment 1: a kind of industry microwave pretreatment complexity golden ore concentrate hard to treat Technology, described technical matters by with
Lower step is carried out: complexity golden ore concentrate hard to treat is placed in continuous way horizontal belt industrial microwave oven and paves by the first step, and seam thickness is
25～100mm, open microwave oven fan, be passed through air；Second step starts microwave heating equipment, to first step gained complicated difficult
Processing Gold Concentrate under Normal Pressure successively to carry out drying and roasting, wherein drying section microwave frequency controls as 915MHz, microwave source single tube power amount
Level is 3kW, 5kW, and it is 120 DEG C～140 DEG C that drying section temperature controls, and drying time is 5～10 minutes；Furnace zone Microwave Frequency
Rate controls to be 915MHz, and microwave source single tube power magnitude is 10kW, 20kW, and it is 400 DEG C～500 DEG C that furnace zone temperature controls,
The roasting volatilization time is 10～15 minutes, and industrial microwave oven Stress control is 0.105MPa, is continuously available volatilization flue gas and Re Jin
Concentrate；Gained volatilization flue gas in second step is sent into recovery system and is reclaimed As by the 3rd step2O3And SO2, produce arsenicum and sulphuric acid；
Hot for gained in second step Gold Concentrate under Normal Pressure is delivered to Cyanide Leaching system and is reclaimed the valuable metals such as gold silver by the 4th step.
NaCN consumption 8.0kg/t, extraction temperature room temperature, pulp density 30%, pH value during above-mentioned steps (4) Cyanide Leaching
10.5, extraction time 24h.According to above-mentioned process conditions, the leaching rate of Jin Heyin is respectively 97% and 58%.
Embodiment 2: a kind of industry microwave pretreatment complexity golden ore concentrate hard to treat Technology, described technical matters by with
Lower step is carried out: complexity golden ore concentrate hard to treat is placed in continuous way horizontal belt industrial microwave oven and paves by the first step, and seam thickness is
25～100mm, open microwave oven fan, be passed through air；Second step starts microwave heating equipment, to first step gained complicated difficult
Processing Gold Concentrate under Normal Pressure successively to carry out drying and roasting, wherein drying section microwave frequency controls as 915MHz, microwave source single tube power amount
Level is 5kW, 10kW, and it is 140 DEG C～160 DEG C that drying section temperature controls, and drying time is 10～15 minutes；Furnace zone microwave
FREQUENCY CONTROL is 915MHz, and microwave source single tube power magnitude is 20kW, 30kW, and it is 500 DEG C～550 DEG C that furnace zone temperature controls,
The roasting volatilization time is 15～20 minutes, and industrial microwave oven Stress control is 0.09MPa, is continuously available volatilization flue gas and hot aurin
Ore deposit；Gained volatilization flue gas in second step is sent into recovery system and is reclaimed As by the 3rd step2O3And SO2, produce arsenicum and sulphuric acid；The
Hot for gained in second step Gold Concentrate under Normal Pressure is delivered to Cyanide Leaching system and is reclaimed the valuable metals such as gold silver by four steps.
NaCN consumption 8.0kg/t, extraction temperature room temperature, pulp density 30%, pH value during above-mentioned steps (4) Cyanide Leaching
10.5, extraction time 24h.According to above-mentioned process conditions, the leaching rate of Jin Heyin is respectively 99% and 60%.
Embodiment 3: a kind of industry microwave pretreatment complexity golden ore concentrate hard to treat Technology, described technical matters by with
Lower step is carried out: complexity golden ore concentrate hard to treat is placed in continuous way horizontal belt industrial microwave oven and paves by the first step, and seam thickness is
25～100mm, open microwave oven fan, be passed through air；Second step starts microwave heating equipment, to first step gained complicated difficult
Processing Gold Concentrate under Normal Pressure successively to carry out drying and roasting, wherein drying section microwave frequency controls as 2450MHz, microwave source single tube power amount
Level is 1kW, 5kW, and it is 160 DEG C～200 DEG C that drying section temperature controls, and drying time is 15～20 minutes；Furnace zone microwave
FREQUENCY CONTROL is 2450MHz, and microwave source single tube power magnitude is 50kW, and it is 550 DEG C～600 DEG C that furnace zone temperature controls, roasting
The burning volatilization time is 20～25 minutes, and industrial microwave oven Stress control is 0.075MPa, is continuously available volatilization flue gas and hot aurin
Ore deposit；Gained volatilization flue gas in the first step is sent into recovery system and is reclaimed As by the 3rd step2O3And SO2, produce arsenicum and sulphuric acid；The
Hot for gained in second step Gold Concentrate under Normal Pressure is delivered to Cyanide Leaching system and is reclaimed the valuable metals such as gold silver by four steps.
NaCN consumption 8.0kg/t, extraction temperature room temperature, pulp density 30%, pH value during above-mentioned steps (4) Cyanide Leaching
10.5, extraction time 24h.According to above-mentioned process conditions, the leaching rate of Jin Heyin is respectively 99.5% and 61%.
Above technical characteristic constitutes highly preferred embodiment of the present invention, and it has stronger adaptability and optimal implementation result, can
Increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.
Claims (4)
1. the Technology with industry microwave pretreatment complexity golden ore concentrate hard to treat, it is characterised in that comprise the steps:
Complexity golden ore concentrate hard to treat is laid in continuous way horizontal belt industrial microwave oven by the first step, seam thickness be 25～
100mm, opens microwave oven fan, is passed through air, forms tiny structure in making microwave oven；
Second step start microwave heating equipment, microwave frequency be set as 300MHz～300GHz, pressure be set as 0.075MPa～
0.105MPa, microwave source single tube power magnitude is 1kW, 3kW, 5kW, 10kW, 20kW, 30kW or 50kW, to
One step gained complexity golden ore concentrate hard to treat successively carries out drying and roasting, and wherein drying section temperature controls is 120 DEG C～200 DEG C, dries
The dry time is 5～20 minutes；It is 400 DEG C～600 DEG C that furnace zone temperature controls, and the roasting volatilization time is 10～30 minutes, even
Continue and obtain volatilize flue gas and hot Gold Concentrate under Normal Pressure；
Gained volatilization flue gas in second step is sent into recovery system and is reclaimed As by the 3rd step2O3And SO2, produce arsenicum and sulphuric acid；
Hot for gained in second step Gold Concentrate under Normal Pressure is delivered to Cyanide Leaching system and is reclaimed the valuable metals such as gold silver by the 4th step.
The Technology of a kind of industry microwave pretreatment complexity golden ore concentrate hard to treat the most as claimed in claim 1, its feature exists
In: described microwave frequency is set as 915MHz or 2450MHz.
The Technology of a kind of industry microwave pretreatment complexity golden ore concentrate hard to treat the most as claimed in claim 1, its feature exists
In: it is 400 DEG C～449 DEG C that described furnace zone temperature controls.
The Technology of a kind of industry microwave pretreatment complexity golden ore concentrate hard to treat the most as claimed in claim 1, its feature exists
In: described industrial microwave oven is continuous way horizontal belt industrial microwave oven.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610388729.XA CN105936976B (en) | 2016-06-03 | 2016-06-03 | A kind of technology with industrial Microwave Pretreatment complexity golden ore concentrate hard to treat |
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| CN201610388729.XA CN105936976B (en) | 2016-06-03 | 2016-06-03 | A kind of technology with industrial Microwave Pretreatment complexity golden ore concentrate hard to treat |
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| CN105936976A true CN105936976A (en) | 2016-09-14 |
| CN105936976B CN105936976B (en) | 2018-07-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108455668A (en) * | 2018-03-30 | 2018-08-28 | 江苏宝钢精密钢丝有限公司 | A kind of green resourceization of the spent acid containing arsenic utilizes method |
| CN110747355A (en) * | 2019-10-22 | 2020-02-04 | 山东恒邦冶炼股份有限公司 | Process and equipment for preparing metal arsenic from crude white arsenic |
Citations (3)
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|---|---|---|---|---|
| CN101225467A (en) * | 2008-02-25 | 2008-07-23 | 沈阳理工大学 | Method for pretreating refractory gold ore by employing microwave calcining |
| CN102758080A (en) * | 2012-07-25 | 2012-10-31 | 福建省双旗山矿业有限责任公司 | Method for microwave roasting and non-cyanogen gold leaching of sulfur-bearing gold mineral |
| CN102758079A (en) * | 2012-07-25 | 2012-10-31 | 福建省双旗山矿业有限责任公司 | Energy-saving optimizing technology for microwave roasting and non-cyanogen gold leaching of sulfur-bearing gold mineral |
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2016
- 2016-06-03 CN CN201610388729.XA patent/CN105936976B/en not_active Expired - Fee Related
Patent Citations (3)
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|---|---|---|---|---|
| CN101225467A (en) * | 2008-02-25 | 2008-07-23 | 沈阳理工大学 | Method for pretreating refractory gold ore by employing microwave calcining |
| CN102758080A (en) * | 2012-07-25 | 2012-10-31 | 福建省双旗山矿业有限责任公司 | Method for microwave roasting and non-cyanogen gold leaching of sulfur-bearing gold mineral |
| CN102758079A (en) * | 2012-07-25 | 2012-10-31 | 福建省双旗山矿业有限责任公司 | Energy-saving optimizing technology for microwave roasting and non-cyanogen gold leaching of sulfur-bearing gold mineral |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108455668A (en) * | 2018-03-30 | 2018-08-28 | 江苏宝钢精密钢丝有限公司 | A kind of green resourceization of the spent acid containing arsenic utilizes method |
| CN108455668B (en) * | 2018-03-30 | 2020-01-07 | 江苏宝钢精密钢丝有限公司 | Green resource utilization method of arsenic-containing waste acid |
| CN110747355A (en) * | 2019-10-22 | 2020-02-04 | 山东恒邦冶炼股份有限公司 | Process and equipment for preparing metal arsenic from crude white arsenic |
| CN110747355B (en) * | 2019-10-22 | 2021-06-15 | 山东恒邦冶炼股份有限公司 | Process and equipment for preparing metal arsenic from crude white arsenic |
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| CN105936976B (en) | 2018-07-27 |
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Effective date of registration: 20210126 Address after: 834506 Baogutu, Miaoergou Town, Tuoli County, Tacheng Prefecture, Xinjiang Uygur Autonomous Region Patentee after: Tuoli Zhaojin Beijiang Mining Co.,Ltd. Address before: 834506 Baogutu, Miaoergou Town, Tuoli County, Tacheng Prefecture, Xinjiang Uygur Autonomous Region Patentee before: XINJIANG XINGTA MINING Co.,Ltd. |
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Granted publication date: 20180727 Termination date: 20210603 |
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